Publications
Products (journal articles, reports, fact sheets) authored by current and past scientists are listed below. Please check the USGS Pubs Warehouse for other USGS publications.
Filter Total Items: 2018
Analysis of MASTER thermal data in the Greeley area of the Front Range Urban Corridor, Colorado — Delineation of sites for infrastructure resource characterization Analysis of MASTER thermal data in the Greeley area of the Front Range Urban Corridor, Colorado — Delineation of sites for infrastructure resource characterization
Sand and soils southwest of Greeley, Colorado, were characterized for mineral composition and industrial quality. Radi-ance data from the thermal channels of the MASTER simulator were calibrated using estimated atmospheric parameters. Chan-nel emissivities were approximated using an estimated ground temperature. Subsequently, a decorrelation algorithm was used to calculate inverse wave...
Authors
K. Eric Livo, Ken Watson
A USGS Study of Talc Deposits and Associated Amphibole Asbestos Within Mined Deposits of the Southern Death Valley Region, California A USGS Study of Talc Deposits and Associated Amphibole Asbestos Within Mined Deposits of the Southern Death Valley Region, California
No abstract available.
Authors
Bradley S. Van Gosen, Heather Lowers, Stephen J. Sutley
Formation of modern and Paleozoic stratiform barite at cold methane seeps on continental margins: Comment and Reply: Comment Formation of modern and Paleozoic stratiform barite at cold methane seeps on continental margins: Comment and Reply: Comment
No abstract available.
Authors
Poul Emsbo, Craig A. Johnson
U-Pb geochronology and evolution of Mesoproterozoic basement rocks, western Connecticut U-Pb geochronology and evolution of Mesoproterozoic basement rocks, western Connecticut
Geologic mapping and U-Pb geochronology by ion microprobe on zircon, titanite, and monazite in the New Milford quadrangle, western Connecticut indicate Meso-proterozoic events at ca. 1.3, 1.05, and 0.99 Ga in the Laurentian basement rocks. Pink granite gneiss (1311 ± 7 Ma) intruded a paragneiss sequence during the early stages of the Elzevirian orogeny. During the Ottawan orogeny, syn...
Authors
Gregory J. Walsh, John N. Aleinikoff, C. Mark Fanning
Chapter 8 Petrogenesis and mineralogic residence of selected elements in the meade peak phosphatic shale member of the permian phosphoria formation, Southeast Idaho Chapter 8 Petrogenesis and mineralogic residence of selected elements in the meade peak phosphatic shale member of the permian phosphoria formation, Southeast Idaho
The Meade Peak Phosphatic Shale Member of the Permian Phosphoria Formation hosts the ore mined by the phosphate industry of southeast Idaho. It also hosts environmentally sensitive elements (ESE) such as Se, As, Hg, Ni, Cd, Zn, and Cr. Primary chemistry, elemental distribution patterns, and mineralogy within the Meade Peak were modified by element migration and possibly the introduction...
Authors
Richard I. Grauch, George A. Desborough, Gregory P. Meeker, A. L. Foster, Russell G. Tysdal, J. R. Herring, Heather A. Lowers, B. A. Ball, Robert A. Zielinski, E. A. Johnson
Non-invasive exploration in an environmentally sensitive world Non-invasive exploration in an environmentally sensitive world
Modern remote sensing provides a means for locating and characterizing exposed mineralized systems in many parts of the world. These capabilities are non-invasive and help target specific areas for more detailed exploration. An example of how remote sensing technology can be used is evident from a study of the Questa Mining District, New Mexico. Analysis of low spectral resolution data...
Authors
K.E. Livo, D. H. Knepper
Effect of bird maneuver on frequency-domain helicopter EM response Effect of bird maneuver on frequency-domain helicopter EM response
Bird maneuver, the rotation of the coil-carrying instrument pod used for frequency-domain helicopter electromagnetic surveys, changes the nominal geometric relationship between the bird-coil system and the ground. These changes affect electromagnetic coupling and can introduce errors in helicopter electromagnetic, (HEM) data. We analyze these effects for a layered half-space for three...
Authors
D.V. Fitterman, C. Yin
Development of microanalytical reference materials for geochemical analysis Development of microanalytical reference materials for geochemical analysis
[No abstract available]
Authors
S. A. Wilson, P.A. Potts
Sedimentology, conodonts and ostracods of the Devonian - Carboniferous strata of the Anseremme railway bridge section, Dinant Basin, Belgium Sedimentology, conodonts and ostracods of the Devonian - Carboniferous strata of the Anseremme railway bridge section, Dinant Basin, Belgium
No abstract available.
Authors
J.-G. Casier, B. Mamet, A. Preat, Charles Sandberg
Nitrate sources and sinks in Elkhorn Slough, California: Results from long-term continuous in situ nitrate analyzers Nitrate sources and sinks in Elkhorn Slough, California: Results from long-term continuous in situ nitrate analyzers
Nitrate and water quality parameters (temperature, salinity, dissolved oxygen, turbidity, and depth) were measured continuously with in situ NO3 analyzers and water quality sondes at two sites in Elkhorn Slough in Central California. The Main Channel site near the mouth of Elkhorn Slough was sampled from February to September 2001. Azevedo Pond, a shallow tidal pond bordering...
Authors
T.P. Chapin, J.M. Caffrey, H.W. Jannasch, L.J. Coletti, J.C. Haskins, K.S. Johnson
Integrated investigations of environmental effects of historical mining in the Basin and Boulder Mining Districts, Boulder River watershed, Jefferson County, Montana Integrated investigations of environmental effects of historical mining in the Basin and Boulder Mining Districts, Boulder River watershed, Jefferson County, Montana
The Boulder River watershed is one of many watersheds in the western United States where historical mining has left a legacy of acid mine drainage and elevated concentrations of potentially toxic trace elements. Abandoned mine lands commonly are located on or affect Federal land. Cleaning up these Federal lands will require substantial investment of resources. As part of a cooperative...
Frequency spectral analysis of GPR data over a crude oil spill Frequency spectral analysis of GPR data over a crude oil spill
A multi-offset ground penetrating radar (GPR) dataset was acquired by the U.S. Geological Survey (USGS) at a crude oil spill site near Bemidji, Minnesota, USA. The dataset consists of two, parallel profiles, each with 17 transmitter-receiver offsets ranging from 0.60 to 5.15m. One profile was acquired over a known oil pool floating on the water table, and the other profile was acquired...
Authors
B.L. Burton, G.R. Olhoeft, M.H. Powers